落叶松是我国北方主要针叶速生用材树种之一。建立落叶松母树林,生产遗传品质得到改良的种子,是提高落叶松人工林生产力的重要途径。利用5—10年生的落叶松幼林中的优良林分改建成母树林,是见效快、质量好,应用广泛的一种建立母树林方式。从选种角度,正确品评林分的优劣,划分林分种性等级,选择优良林分改建母树林,是提高种子遗传品质的先决条件。而正确制定林分种性评价标准,则是选择优良林分的前提。目前国内外,对林分种性评价标准不一,对落叶松幼林来讲,均不太适用。为探讨适用于我国落叶松幼林种性评价标准,我们在母树林规划设计中,试用了林分平均高±标准差,做为 Larix is ​​one of the main species of coniferous wood in North China. Establishing the Larix chinensis forest and producing seeds with improved genetic quality are important ways to improve the productivity of Larix gmelinii plantation. It is a quick and good quality and widely used method to establish the mother tree by rebuilding the mother tree forest with the fine forest in the young larvae aged 5 to 10 years. From the point of view of seed selection, it is a prerequisite to improve the genetic quality of seeds by correctly assessing the pros and cons of forest stand, dividing the stand rank of forest, and choosing the good stand to rebuild the parent forest. However, it is a prerequisite to choose the optimal stand to establish the standard of forest stand evaluation. At home and abroad, the evaluation criteria for forest species diversity are not suitable for young larch forests. In order to explore the evaluation criteria for the larch plantation in China, we tested the mean ± standard deviation